ENS 53824
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ENS Event | |
|---|---|
06:00 Jan 13, 2019 | |
| Title | High Pressure Core Spray Self Test Failure |
| Event Description | On January 13, 2019, the Self Test System reported a fault associated with the logic system for the High Pressure Core Spray (HPCS) high reactor water level closure function that could prevent the system from performing its safety function. The HPCS system was subsequently declared inoperable with actions taken per LCO [Limiting Condition for Operation] 3.6.1.3 to close and deactivate the 1E12-F004 valve, a primary containment isolation valve.
Since HPCS is an emergency core cooling system and is a single train safety system, this condition is reportable under 10 CFR 50.72(b)(3)(v)(D) 'Any event or condition that could have prevented the fulfillment of the safety function of structures or systems that are needed to mitigate the consequences of an accident.' The NRC Resident Inspector has been notified. HPCS is in a 14-day technical specification LCO action statement. |
| Where | |
|---|---|
Clinton  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident | |
| Time - Person (Reporting Time:+11.82 h0.493 days <br />0.0704 weeks <br />0.0162 months <br />) | |
| Opened: | Tim Lanier 17:49 Jan 13, 2019 |
| NRC Officer: | Mark Abramovitz |
| Last Updated: | Jan 13, 2019 |
| 53824 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (99 %) |
| After | Power Operation (99 %) |
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